US5039379A - Dry cooling of coke - Google Patents

Dry cooling of coke Download PDF

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Publication number
US5039379A
US5039379A US07/276,268 US27626888A US5039379A US 5039379 A US5039379 A US 5039379A US 27626888 A US27626888 A US 27626888A US 5039379 A US5039379 A US 5039379A
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United States
Prior art keywords
coke
crushing
bucket
streams
dry cooling
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Expired - Fee Related
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US07/276,268
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English (en)
Inventor
Gerd Nashan
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RAG AG
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Ruhrkohle AG
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Assigned to RUHRKOHLE AG reassignment RUHRKOHLE AG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NASHAN, GERD
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B39/00—Cooling or quenching coke
    • C10B39/02—Dry cooling outside the oven

Definitions

  • This invention relates to a method of dry cooling coke and, more specifically, to such dry cooling which includes the crushing of the hot coke to small particles prior to the delivery to a cooling shaft or the like.
  • the dry cooling of coke is a process which is sometimes employed in contrast to the wet quenching of coke.
  • wet quenching the coke is sprayed with water until it has undergone sufficient cooling.
  • Wet quenching of course, is a simple process, but one which produces considerable emissions. Additionally, the energy contained in the hot coke is lost during some wet quenching operation.
  • dry-cooled coke contains no water, which unnecessarily consumes additional heat when, for example, the coke is used in a blast furnace.
  • dry cooling process a higher coke strength and lower abrasion values are achieved.
  • the basic principle of dry cooling of coke is to directly extract the tangible heat of the coke by means of an inert cooling medium, and to obtain this heat in a readily-usable and efficient form, such as steam.
  • the process typically includes the hot coke being removed from the coking chamber in buckets.
  • the buckets are transported to a vertical cooling shaft and are emptied into the top of the shaft.
  • As the coke is still falling through a sluice or lock onto the shaft containing the coke, it is cooled by a countercurrent or counterflow of inert gas.
  • the cold coke is removed by means of a lock or sluice.
  • the hot circulating gas exits the shaft in the upper portion and is conducted by way of a dust removal apparatus to the waste heat boiler for steam generation.
  • the cooled gas is sucked in by the fan through another dust removal apparatus and is injected in the lower part of the shaft to cool the coke.
  • a more recent development provides that there is both a direct and indirect heat extraction from the coke by inert gas and by evaporator heating surfaces.
  • the heat extracted in the inert gas circuit is used, on one hand, to heat water as it flows by the evaporator heating surfaces and, on the other hand, to superheat the steam.
  • the quantity of circulating gas is reduced, and thus the power consumption required to move it is also reduced.
  • the coke heat to be extracted is completely converted into steam.
  • the determining factor for the efficiency of such installations is primarily the thermal transfer between the coke and the cooling surface and/or between the coke and the inert gas.
  • U.S. Pat. No. 4,668,343 discloses a method of dry cooling red-hot coke in a vessel having an antechamber with a small discharge leading to a vertically elongated cooling chamber which is of a larger dimension than the discharge and with both the cooling chamber and the antechamber having fluid cooling tubes in one or more walls and the ceiling thereof and also having cooling tube bank diverging downwardly from the discharge of the antechamber into the cooling chamber.
  • the method comprises directing the red-hot coke to be cooled downwardly through the antechamber and into the cooling chamber so as to maintain a charge of coke in the cooling chamber to the conical charge cone of the cooling tubes adjacent the top of the cooling chamber which extends downwardly below the discharge, thereafter circulating a coolant through the cooling tubes to effect transfer of sensible heat from the coke to the fluid and directing a cooling gas from the bottom of the cooling chamber upwardly through the coke and above the entire area of the coke charging cone and then into an exhaust duct to one or more waste heat boilers.
  • U.S. Pat. No. 4,559,107 discloses a method of dry cooling coke using a coke transporting bucket which has a removable cover with an exhaust pipe extending from the interior of the bucket to an exterior exhaust connection and a cooling shaft for the coke comprises directing red hot coke into the bucket, covering the bucket with the cover and transporting the coke to the cooling shaft and connecting the exhaust pipe to the exhaust system while the bucket is in the shaft and emptying the bucket into the cooling shaft.
  • the coke transporting bucket comprises a container having a bottom discharge which is closable by a flap and a removable cover which seats around the rim of the container to seal it.
  • An exhaust pipe is carried by the cover and it extends into the interior thereof for removing gases from within the bucket and delivering them to an exterior connection which is connectable to an exhaust line.
  • One or two exhaust pipes may be provided on the cover and each includes cover flaps which are biased into a closed position but which open to connect to the exhaust system when the cover is positioned to engage the exhaust line.
  • the cover advantageously includes longitudinal girders which extend outwardly from each side or end of the cover and provide a means for supporting the cover when the bucket is lowered beneath a support structure to free the cover from the bucket.
  • the present invention which includes the hot coke being crushed before the cooling process. Because of the reduced particle size, the coke has a surface area which is many times larger than would exist without the crushing. The surface area is increased by the same proportion for contact of the coke with the inert gas and for the contact of the coke with the evaporator heat surfaces. For the same cooling effort, the results become significantly more effective. This fact can be advantageously utilized to increase the quantitative flow of coke into the cooling shaft or to decrease the required volume of the coke dry cooling plant. There are also significant advantages for the structural support elements required for the cooling shaft. The cooling shaft need not be designed as massively, which is another economic advantage of the present invention.
  • a reduction in the amount of flow of hot coke makes it possible to significantly improve regulation of the installation. It is advantageous to first discharge the hot coke into a 2-way bunker having a system of discharge rolls.
  • the 2-way bunker can be opened and closed by means of the discharge rolls and damming rakes.
  • the rolls and rakes make possible a continuous, controlled transfer to the hot coke crusher where the coke is subsequently crushed, preferably, to an average particle size of 50 mm.
  • the bunker discharge capacity is regulated by changing the roll speed or the height of the coke layer.
  • the rakes, rolls and hot crushers are water-cooled at the parts which are subjected to particularly high thermal stresses.
  • the transfer points are connected to a dust removal system.
  • the hot crushers discharge the crushed coke to transport buckets. These buckets are offset from the crushers so that the crushers are protected from radiated heat by offset chutes which direct the crushed coke to the buckets. There is included means for measuring the level of the load in the buckets. At the same time, accessory rolls and rakes may be employed to limit the amount of material in the buckets.
  • each bucket is connected by means of a movable transfer apparatus to the discharge chute from the hot crusher, in a manner which prevents emissions.
  • the feed is discontinued.
  • the transfer apparatus is raised, the top of the bucket is closed. The bucket is then transferred to the cooling shaft and the hot coke is discharged in the manner described above.
  • a preferred method of dry cooling coke includes the steps of removing the coke from the coke oven and crushing the coke with a crushing device to increase a surface area thereof. Additional steps include transporting the coke after crushing to a dry cooling apparatus and dry cooling the coke by transfer of heat at the surface area which has been increased by the crushing.
  • FIG. 1 is a schematic, elevational view of the preferred coke delivery and crushing equipment including various features of the invention.
  • FIG. 2 is a schematic view of the equipment as seen along Line II--II of FIG. 1.
  • the hot coke coming from the coke oven (not shown) is discharged into the two-way bunker 1 by means of a transport cassette 2 represented by a dotted line.
  • a transport cassette 2 represented by a dotted line.
  • the preferred adjustable coke catching apparatus 3 includes a shutter which can be adjustably activated by means of a power piston to control the dumping process. In other words, as the cassette 2 becomes emptier, the shutter widens to give increasing access for the hot coke being discharged into the bunker 1.
  • the coke supplied to the bunker 1 is uniformly distributed in the bunker 1 into the two bunker paths 4 and 5.
  • the hot crushers 7 are advantageously designed for convenient removal so that each of the hot crushers 7 can be respectively replaced for service and/or repair with a back-up hot crusher 8 shown in a stored position in FIG. 1.
  • the coke is crushed to an average particle size of about 50 mm.
  • the coke travels into one of the chutes of a coke distributor 9 having a controllable distributor head 10.
  • the distributor head 10 is controlled to selectively move horizontally to adjust the downward path of the coke to cause it to be introduced into one or the other of the chutes.
  • the coke is directed to the chute underneath which there is a bucket 11 for transporting the hot, crushed coke.
  • a transfer apparatus 12 at the outlet or discharge of the chute ensures that the charging process does not produce any emissions.
  • the flow of coke is discontinued and the transfer apparatus 12 is retracted so that the bucket 11 can be moved.
  • a cover or lid can then be placed over the bucket 11 by means of an apparatus 13, and the bucket thereby closed.
  • the bucket 11 can then be moved, as shown by the direction arrows in FIG. 2, in order to deliver the crushed coke to the top of a cooling shaft (not shown) for subsequent dry cooling.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
US07/276,268 1987-11-24 1988-11-25 Dry cooling of coke Expired - Fee Related US5039379A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3739789 1987-11-24
DE19873739789 DE3739789A1 (de) 1987-11-24 1987-11-24 Kokstrockenkuehlung

Publications (1)

Publication Number Publication Date
US5039379A true US5039379A (en) 1991-08-13

Family

ID=6341146

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/276,268 Expired - Fee Related US5039379A (en) 1987-11-24 1988-11-25 Dry cooling of coke

Country Status (5)

Country Link
US (1) US5039379A (de)
EP (1) EP0317752A3 (de)
JP (1) JPH01156393A (de)
CA (1) CA1324336C (de)
DE (1) DE3739789A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8236142B2 (en) 2010-05-19 2012-08-07 Westbrook Thermal Technology, Llc Process for transporting and quenching coke
CN113429987A (zh) * 2021-07-28 2021-09-24 新兴铸管股份有限公司 一种干熄焦炉产量自动提取系统及控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011115699A1 (de) 2011-10-12 2013-04-18 Thyssenkrupp Uhde Gmbh Verfahren zur trockenen Kühlung von Koks mit Kohlendioxid mit anschließender Verwendung des erzeugten Kohlenmonoxids
DE102011115698A1 (de) 2011-10-12 2013-04-18 Thyssenkrupp Uhde Gmbh Verfahren zur trockenen Kühlung von Koks mit Wasserdampf mit anschliessender Verwendung des erzeugten Synthesegases

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593698A (en) * 1924-11-27 1926-07-27 Illingworth Carbonization Co Cooling of coke and in apparatus therefor
US2155374A (en) * 1938-06-02 1939-04-18 Louis N Hartog Process and apparatus for manufacturing malto-dextrine
US2199945A (en) * 1937-10-26 1940-05-07 Pittsburgh Coal Carbonization Cooling low temperature coke
US4142942A (en) * 1974-06-14 1979-03-06 Albert Calderon Method and apparatus for quenching coke
US4521279A (en) * 1982-02-26 1985-06-04 Firma Carl Still Gmbh & Co. Kg Apparatus for dry cooling coke
US4556455A (en) * 1982-01-28 1985-12-03 Firma Carl Still Gmbh & Co. Kg Method of charging dry coke cooling pit using sluice
US4606793A (en) * 1981-06-11 1986-08-19 Vladan Petrovic Method for the operation of a carbonization plant
US4668343A (en) * 1983-09-10 1987-05-26 Firma Carl Still Gmbh & Co. Kg Method for dry cooling red-hot coke
US4701243A (en) * 1985-02-21 1987-10-20 Firma Carl Still Gmbh & Co. Kg Method for cooling and dedusting dry cooled coke

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519441C (de) * 1924-10-05 1931-02-27 Carbo Union Ind Mij Nv Verfahren zur Trockenkuehlung von Halbkoks
DE3014574C2 (de) * 1980-04-16 1984-02-02 Carl Still Gmbh & Co Kg, 4350 Recklinghausen Austragvorrichtung für Kokstrockenkühlkammern
DE3030969A1 (de) * 1980-08-16 1982-04-01 Dr. C. Otto & Comp. Gmbh, 4630 Bochum Verfahren zur trockenen kuehlung von heissem rohkoks und vorrichtung zur durchfuehrung des verfahrens

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593698A (en) * 1924-11-27 1926-07-27 Illingworth Carbonization Co Cooling of coke and in apparatus therefor
US2199945A (en) * 1937-10-26 1940-05-07 Pittsburgh Coal Carbonization Cooling low temperature coke
US2155374A (en) * 1938-06-02 1939-04-18 Louis N Hartog Process and apparatus for manufacturing malto-dextrine
US4142942A (en) * 1974-06-14 1979-03-06 Albert Calderon Method and apparatus for quenching coke
US4606793A (en) * 1981-06-11 1986-08-19 Vladan Petrovic Method for the operation of a carbonization plant
US4556455A (en) * 1982-01-28 1985-12-03 Firma Carl Still Gmbh & Co. Kg Method of charging dry coke cooling pit using sluice
US4521279A (en) * 1982-02-26 1985-06-04 Firma Carl Still Gmbh & Co. Kg Apparatus for dry cooling coke
US4559107A (en) * 1982-02-26 1985-12-17 Firma Carl Still Gmbh & Co. Kg. Method for dry cooling coke
US4668343A (en) * 1983-09-10 1987-05-26 Firma Carl Still Gmbh & Co. Kg Method for dry cooling red-hot coke
US4701243A (en) * 1985-02-21 1987-10-20 Firma Carl Still Gmbh & Co. Kg Method for cooling and dedusting dry cooled coke

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8236142B2 (en) 2010-05-19 2012-08-07 Westbrook Thermal Technology, Llc Process for transporting and quenching coke
CN113429987A (zh) * 2021-07-28 2021-09-24 新兴铸管股份有限公司 一种干熄焦炉产量自动提取系统及控制方法
CN113429987B (zh) * 2021-07-28 2022-03-22 新兴铸管股份有限公司 一种干熄焦炉产量自动提取系统及控制方法

Also Published As

Publication number Publication date
JPH01156393A (ja) 1989-06-19
CA1324336C (en) 1993-11-16
EP0317752A2 (de) 1989-05-31
EP0317752A3 (de) 1989-08-09
DE3739789A1 (de) 1989-06-08

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Owner name: RUHRKOHLE AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NASHAN, GERD;REEL/FRAME:005004/0549

Effective date: 19881215

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REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19950816

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362